<html> <head> <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1"> <title>GRASS Tutorial for nviz</title> <link rel="stylesheet" href="grassdocs.css" type="text/css"> </head> <body bgcolor="#FFFFFF" link="#0000DF" vlink="#006000"> <img src="grass_logo.png"><hr align=center size=6 noshade> <h1>NVIZ Reference Manual</h1> <hr width="100%" align=center size=4 noshade> <p> <a href="nviz_toc.html">CONTENTS</a> </p> <h2>What's Here Panel</h2> <p>The <strong>What's Here</strong> panel lets you interactively query surfaces, vectors and sites displayed in the <strong>NVIZ</strong> viewer. Query results appear in the <strong>What's Here</strong> text box. You can also pipe results directly to a text file. Query points appear in the <strong>NVIZ</strong> viewer as icons. </p> <BR><BR> <DL><DD> <img src="nvimg/panel/whats.gif" alt="What's Here Panel" width="292" height="284"> </DD></DL> <BR><BR> <h3>OPTIONS</h3> <dl> <dt> <strong>What's Here?</strong></dt> <dd>Turns the <strong>What's Here</strong> interactive query on and off. <br><br></dd> <dt> <strong>Attributes</strong></dt> <dd>Lets you select optional output query attributes. <br><br> <img src="nvimg/panel/whats_options.gif" alt="What's Here Options" width="143" height="182"> <br><br></dd> <dd> <dl> <dt> <strong>Map Name</strong></dt> <dd>Names the query map (surface) used. <br><br></dd> <dt> <strong>Easting</strong></dt> <dd>Provides the easting of the query point. <br><br></dd> <dt> <strong>Northing</strong></dt> <dd>Provides the northing of the query point. <br><br></dd> <dt> <strong>Elevation</strong></dt> <dd>Provides the elevation of the query point. <br><br></dd> <dt> <strong>Color Category</strong></dt> <dd>Provides the surface color (as RGB) of the query point. <br><br></dd> <dt> <strong>XY Dist from Prev</strong></dt> <dd>Provides the horizontal distance (XY) between the current and the previous query points. <br><br></dd> <dt> <strong>XYZ Dist from Prev</strong></dt> <dd>Provides the actual distance (XYZ) between the current and the previous query points. <br><br></dd> <dt> <strong>Dist Along Surface</strong></dt> <dd>Provides the overland (draped) distance between the current and the previous query points. If selected, a line draws between the current and the previous query points. <br><br></dd> <dt> <strong>Dist Along Exag Surface</strong></dt> <dd>Provides the overland (draped) distance between the current and the previous query points using vertically exaggerated elevations. The vertical exaggeration used in this calculation comes from the surface <strong>zexag</strong> value. If selected, a line draws between the current and the previous query points. <br><br></dd> <dt> <strong>Postgres</strong></dt> <dd>Queries the selected (g.select.pg) database based on results from the current query point. <br><br></dd> </dl></dd> <dt> <strong>Reset</strong></dt> <dd>Adds a horizontal line to the query output. <br><br></dd> <dt> <strong>Clear</strong></dt> <dd>Clears the <strong>What's Here</strong> panel text box (query results). <br><br></dd> <dt> <strong>Query vector</strong></dt> <dd>Uses the query results from selected vector (see Query map) to query a selected (g.select.pg) Postgres database. <br><br></dd> <dt> <strong>Query sites</strong></dt> <dd>Uses the query results from selected sites file (see Query map) to query a selected (g.select.pg) Postgres database. <br><br></dd> <dt> <strong>Query map</strong></dt> <dd>Selects the file (vector or sites) to use for the Postgres query. If you select <strong>Query vector</strong>, provide a vector map name. If you select <strong>Query sites</strong>, provide a sites file name. <br><br></dd> <dt> <strong>PG Table</strong></dt> <dd>Enter the name of the Postgres table. The table must be in the currently selected Postgres database. <br><br></dd> <dt> <strong>key col</strong></dt> <dd>Enter the name of the column in the Postgres table. The column must be in the currently selected table. <br><br></dd> <dt> <strong>Xcol</strong></dt> <dd>Enter the name of the easting column in the selected Postgres table. Use only with the <strong>Query sites</strong> option. <br><br></dd> <dt> <strong>Ycol</strong></dt> <dd>Enter the name of the northing column in the selected Postgres table. Use only with the <strong>Query sites</strong> option. <br><br></dd> <dt> <strong>Dist</strong></dt> <dd>Enter the radius from the selected query point to search the Postgres <strong>Xcol</strong> and <strong>Ycol</strong>. In other words, return all of the database records within the set distance from the selected point. <br><br></dd> <dt> <strong>Pipe to</strong></dt> <dd>Outputs query results to a user defined text file. <br><br></dd> <dt> <strong>Close</strong></dt> <dd>Closes the <strong>What's Here</strong> panel. <br><br></dd> </dl> </body> </html>
